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Standard deviation


In statistics, the standard deviation is a measure that is used to quantify the amount of variation or dispersion of a set of data values. A low standard deviation  ...

Standard Deviation and Variance - Math is Fun


The Standard Deviation is a measure of how spread out numbers are. Its symbol is σ (the greek letter sigma). The formula is easy: it is the square root of the ...

Standard Deviation Formulas - Math is Fun


The symbol for Standard Deviation is σ (the Greek letter sigma). This is the formula for Standard Deviation: Say what? Please explain! OK. Let us explain it step ...

Standard deviation | Displaying and describing data | Khan Academy


Learn how to calculate standard deviation, how it relates to variance and mean, and the difference between population and sample standard deviation.

Standard Deviation - Robert Niles


A simpler explanation of standard deviation, written by a former math-major- turned-journalist who likes to explain math to people don't understand or just plain ...

Formulae for the standard deviation

libweb.surrey.ac.uk/library/skills/Number Skills Leicester/page_19.htm

Whilst it is not necessary to learn the formula for calculating the standard deviation, there may be times when you wish to include it in a report or dissertation.

Standard Deviation -- from Wolfram MathWorld


Physical scientists often use the term root-mean-square as a synonym for standard deviation when they refer to the square root of the mean squared deviation of ...

Standard Deviation Definition | Investopedia


1. A measure of the dispersion of a set of data from its mean. The more spread apart the data, the higher the deviation. Standard deviation is calculated as the ...

Standard Deviation Calculator - Calculate Mean, Variance of the ...


Standard Deviation (SD) is the measure of spread of the numbers in a set of data from its mean value. It is also called as SD and is represented using the symbol ...

Standard Deviation | How and when to use the Sample and ...


A guide on the standard deviation including when and how to use the standard deviation and examples of its use.

Standard Deviation
1. A measure of the dispersion of a set of data from its mean. The more spread apart the data, the higher the deviation. Standard deviation is calculated as the square root of variance. 2. In finance, standard deviation is applied to the annual rate... More »
How to Calculate Standard Deviation
Determining the standard deviation is important in mathematics in order to measure accuracy. Calculate the standard deviation with tips from a teacher in this free video on math and science.... More »
Difficulty: Moderate
Source: www.ehow.com